案例_添加删除修改功能实现

2022-08-17 14:30:08 阅读：98 来源： 互联网

标签：删除 request id 案例添加 user import servlet response

添加功能实现：

add.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%--
  Created by IntelliJ IDEA.
  User: lihaiyang
  Date: 2022/8/17
  Time: 13:11
  To change this template use File | Settings | File Templates.
--%>
<!-- HTML5文档-->
<!DOCTYPE html>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
<head>
    <!-- 指定字符集 -->
    <meta charset="utf-8">
    <!-- 使用Edge最新的浏览器的渲染方式 -->
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <!-- viewport视口：网页可以根据设置的宽度自动进行适配，在浏览器的内部虚拟一个容器，容器的宽度与设备的宽度相同。
    width: 默认宽度与设备的宽度相同
    initial-scale: 初始的缩放比，为1:1 -->
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <!-- 上述3个meta标签*必须*放在最前面，任何其他内容都*必须*跟随其后！ -->
    <title>添加用户</title>

    <!-- 1. 导入CSS的全局样式 -->
    <link href="css/bootstrap.min.css" rel="stylesheet">
    <!-- 2. jQuery导入，建议使用1.9以上的版本 -->
    <script src="js/jquery-2.1.0.min.js"></script>
    <!-- 3. 导入bootstrap的js文件 -->
    <script src="js/bootstrap.min.js"></script>
</head>
<body>
<div class="container">
    <center><h3>添加联系人页面</h3></center>
    <form action="${pageContext.request.contextPath}/addUserServlet" method="post">
        <div class="form-group">
            <label for="name">姓名：</label>
            <input type="text" class="form-control" id="name" name="name" placeholder="请输入姓名">
        </div>

        <div class="form-group">
            <label>性别：</label>
            <input type="radio" name="gender" value="男" checked="checked"/>男
            <input type="radio" name="gender" value="女"/>女
        </div>

        <div class="form-group">
            <label for="age">年龄：</label>
            <input type="text" class="form-control" id="age" name="age" placeholder="请输入年龄">
        </div>

        <div class="form-group">
            <label for="address">籍贯：</label>
            <select name="address" class="form-control" id="jiguan">
                <option value="广东">广东</option>
                <option value="广西">广西</option>
                <option value="湖南">湖南</option>
            </select>
        </div>

        <div class="form-group">
            <label for="qq">QQ：</label>
            <input type="text" class="form-control" name="qq" placeholder="请输入QQ号码"/>
        </div>

        <div class="form-group">
            <label for="email">Email：</label>
            <input type="text" class="form-control" name="email" placeholder="请输入邮箱地址"/>
        </div>

        <div class="form-group" style="text-align: center">
            <input class="btn btn-primary" type="submit" value="提交" />
            <input class="btn btn-default" type="reset" value="重置" />
            <input class="btn btn-default" type="button" value="返回" />
        </div>
    </form>
</div>
</body>
</html>

AddUserServlet

package com.ailyt.servlet;

import com.ailyt.domain.User;
import com.ailyt.service.UserServiceImpl;
import lombok.SneakyThrows;
import org.apache.commons.beanutils.BeanUtils;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;
import java.util.Map;

@WebServlet(name = "addUserServlet", value = "/addUserServlet")
public class AddUserServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }

    @SneakyThrows
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

        response.setContentType("text/html;charset=utf-8");
        request.setCharacterEncoding("utf-8");
        response.setCharacterEncoding("utf-8");
        Map<String,String[]> map = request.getParameterMap();

        User user = new User();

        BeanUtils.populate(user,map);

        UserServiceImpl userService = new UserServiceImpl();
        userService.addUser(user);

        response.sendRedirect(request.getContextPath() + "/userListServlet");
    }
}

UserDapImpl

    public void addUser(User user) {
        String sql = "insert into user values(null,?,?,?,?,?,?,null,null)";
        int update = template.update(sql, user.getName(), user.getGender(), user.getAge(), user.getAddress(), user.getQq(), user.getEmail());
        if (update >= 1) {
            System.out.println("添加成功");
        } else {
            System.out.println("添加失败");
        }
    }

删除功能实现：

删除按钮绑定当前记录的id
DelUserServlet
- 获取参数id
- 调用service删除
- 跳转查询所有Servlet
UserService
- 调用dao层
UserDao:
- 操作数据库删除

代码实现：

DelUserServlet：

package com.ailyt.servlet;

import com.ailyt.service.UserServiceImpl;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;

@WebServlet(name = "delUserServlet", value = "/delUserServlet")
public class DelUserServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        response.setContentType("test/html;charset=utf-8");

        String id = request.getParameter("id");
        UserServiceImpl userService = new UserServiceImpl();
        userService.delUser(id);

        response.sendRedirect(request.getContextPath() + "/userListServlet");

    }
}

UserDao：

    @Override
    public void delUser(int id) {
        String sql = "delete from user where id = ?";
        template.update(sql,id);
    }

UserService：

    @Override
    public void delUser(String id) {
        userDao.delUser(Integer.parseInt(id));
    }

修改功能实现

<%--
  Created by IntelliJ IDEA.
  User: lihaiyang
  Date: 2022/8/17
  Time: 14:05
  To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<!DOCTYPE html>
<!-- 网页使用的语言 -->
<html lang="zh-CN">
<head>
    <!-- 指定字符集 -->
    <meta charset="utf-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <title>修改用户</title>

    <link href="css/bootstrap.min.css" rel="stylesheet">
    <script src="js/jquery-2.1.0.min.js"></script>
    <script src="js/bootstrap.min.js"></script>

</head>
<body>
<div class="container" style="width: 400px;">
    <h3 style="text-align: center;">修改联系人</h3>
    <form action="${pageContext.request.contextPath}/userListServlet" method="post">
        <div class="form-group">
            <label for="name">姓名：</label>
            <input type="text" class="form-control" id="name" value="${user.name}" name="name"  readonly="readonly" placeholder="请输入姓名" />
        </div>

        <div class="form-group">
            <label>性别：</label>
            <input type="radio" name="gender" value="男"  />男
            <input type="radio" name="gender" value="女"  />女
        </div>

        <div class="form-group">
            <label for="age">年龄：</label>
            <input type="text" class="form-control" id="age" value="${user.age}"  name="age" placeholder="请输入年龄" />
        </div>

        <div class="form-group">
            <label for="address">籍贯：</label>
            <select name="address" class="form-control" >
                <option value="广东">广东</option>
                <option value="广西">广西</option>
                <option value="湖南">湖南</option>
            </select>
        </div>

        <div class="form-group">
            <label for="qq">QQ：</label>
            <input type="text" class="form-control" value="${user.qq}" name="qq" placeholder="请输入QQ号码"/>
        </div>

        <div class="form-group">
            <label for="email">Email：</label>
            <input type="text" class="form-control" value="${user.email}" name="email" placeholder="请输入邮箱地址"/>
        </div>

        <div class="form-group" style="text-align: center">
            <input class="btn btn-primary" type="submit" value="提交" />
            <input class="btn btn-default" type="reset" value="重置" />
            <input class="btn btn-default" type="button" value="返回"/>
        </div>
    </form>
</div>
</body>
</html>

package com.ailyt.servlet;

import com.ailyt.domain.User;
import com.ailyt.service.UserServiceImpl;

import javax.servlet.*;
import javax.servlet.http.*;
import javax.servlet.annotation.*;
import java.io.IOException;

@WebServlet(name = "findUserServlet", value = "/findUserServlet")
public class FindUserServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }

    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
        String id = request.getParameter("id");
        UserServiceImpl userService = new UserServiceImpl();
        User user = userService.findByid(id);

        request.setAttribute("user",user);
        request.getRequestDispatcher("/update.jsp").forward(request,response);

    }
}

标签：删除,request,id,案例,添加,user,import,servlet,response
来源： https://www.cnblogs.com/ailhy/p/16594875.html

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